DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ1.2a(i)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.sl.TZ1.2a(i) |
| Level | sl | Paper | 3 | Time zone | TZ1 |
| Command term | Estimate | Question number | a(i) | Adapted from | N/A |
a(i).
[Maximum mark: 1]
19M.3.sl.TZ1.2a(i)
Powdered zinc was reacted with 25.00 cm3 of 1.000 mol dm−3 copper(II) sulfate solution in an insulated beaker. Temperature was plotted against time.
(a(i))
Estimate the time at which the powdered zinc was placed in the beaker.
[1]
Markscheme
100 «s» [✔]
Note: Accept 90 to 100 s.
Examiners report
Almost all candidates identified 100 s as the time at which the reaction was initiated.
